Automatic lift and drop cabinet.



'No. 732,168. PATENTBD JUNE 30, 1903.

W. S. GARLISLB.

AUTOMATIC LIFT AND DROP CABINET.

AYPLIOATION FILED APR. 14, 1902. N0 MODEL. 2 SHEETS-SHEET 1.-

PATENTED JUNE 30, 1908.

W. S. GARLISLE.

AUTOMATIC LIFT AND DROP CABINET.

APPLICATION FILED APR. 14, 1902.

2 SHEETS-8HEBT 2.

H0 MDDEL.

UNITE STATES Patented June 30, 1903.

I PATENT OFFICE.

WILLIAM S. CARLISLE, OF DAYTON, OHIO, ASSIGNOR TO THE DAVIS SEWINGMACHINE COMPANY, OF DAYTON, OHIO, A CORPORATION OF OHIO.

AUTOMATIC LIFT AND DROP CABINET.

S PECIFICATION formingpart of Letters Patent No. 732,168, dated June 30,1903.

Application fi1ec'lApril14,1902. SerialNo. 102,700. (Nomodel'l To allwhom it may concern.-

Be it known that 1, WILLIAM S. OAELIsLE, a citizen of the United States,residing atDayton, in the county of Montgomery and State of 5 Ohio, haveinvented certain new and useful Improvements in Automatic Lift and DropCabinets; and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the ac-' machine, type-writer, or other machine may be secured andwhen desired dropping and covering the same into a dust-proof recepz 5tacle.

In order to hold the machine-table in working. position free fromvibration, I have devised means whereby a constant elastic pull isexerted on the chain, belt, or cable that is used in bringing intoaction the other portions of the lift mechanism, the said elastic actionholding rigidly the movable machinetable against the stops that limitthe upward position of the said table.

3 5 A further object of the invention is to provide lift and dropmechanism which is inclosed and is operatedwholly within the dustproofcasing or drum which incloses the under part of the machine-cabinet. Thespace which said dust-proof casing or drum occupies is necessarilylimited or circumscribed for two reasons: First, it is necessary thatwheel with which the pitman is connected must be mounted on the ironframe of the machine in a proper position to permit of the employment ofa suitable length pitman. Owing to these conditions it will be apparentthat the lift and drop mechanism must be constructed and arranged tomove entirely within the interior of a dust-proof casing of restricteddimensions.

Preceding adetail description of my invention, reference is made to theaccompanying drawings, in which the cabinet is attached to the usualiron stand of a sewing-machine.

Figure 1 is a perspective view showing the movable machine-tableelevated to the upper position. Fig. 2 is a similar view showing themovable machine-table in an intermediate position. Fig. 3 is a similarview showing the movable machine-table in the dropped position withcabinet closed. Fig. 4 is a crosssectional view through the upperportion of the cabinet, showing the path of movement of the lift anddrop mechanism. Fig. 5 is an enlarged detail of the adjusting deviceconnecting the chain to the lift-bar. Figs. 6 and 7 are detail viewsshowing means for adjusting the roll-tracks.

In the several views of the drawings similar reference charactersindicate correspond ing parts.

1 designates the usual top table of a sewing-machine cabinet,type-writer cabinet, or similar cabinet.

2 is a hinged leaf or cover.

The stationary table 1 has a suitable rectangular opening 3 therein ofproper dimensions to receive the movable machine-table 4:, which ishinged in the rear of said opening at 5 to a suitable raised portion 1,which surrounds the rectangular opening '3. The raised portion 1isapproximately thesaine thickness as the hinged leaf 2, and the saidhinged leaf 2 is hinged to said raised portion 1. Upon the movable table4is secured the machine, which in this case is a sewing-machine.

6 6 designate two arms or braces which have their upper ends pivoted at7 to the under side of the movable table 4, at or near the ends of saidtable, by means of journal-pieces drum 12.

8. The lower ends of said arms are connected to a horizontal bar 9. Thisbar has mounted on its ends adjacent to the arms 6 two rollers 1010,which ride against tracks 11 11, which tracks are secured in uprightpositions at the rear side of the cabinet and in this case to the sidepieces 20 of the drum 12. The construction of the movablemachine-tableis well known. Much of the material is cut out of the bodyto provide the usual opening for the bed of the machine. Therefore saidmovable table has much the appearance of a frame and is of a frailnature. It is therefore obvious that a swinging frame which has aconnection with such table at opposite ends thereof will provide asupport for said table that will prevent vibrations of the same when themachine is in operation. The horizontal bar 9 is made of such materialand size that when the movable machine-table 4 is raised to the upperposition an elastic pull or tension is transmitted by the said bar 9through the chain 14 to the arms 6 6 and rollers 10 10 against tracks 1111, thus holding the movable table 4 against suitable stops (not shown)in a rigid position. The tracks 11 11 have their inner surfaces, or thesurfaces with which the rollers engage, tapered, so as to allow a properrearward movement of the bar 9 in descending to the position shown inFig. 4 in order that the movement of said bar 9 and the attached arms 66 may operate within the limit of the drum or dustproof case 12. Thisdrum or dust-proof casing 12 is a well-known feature of sewing-inachinecabinets and is important in protecting the machine from dust when saidmachine is lowered or dropped. The movable machine- 'table 4 has abrake-joint 13 in the nature of a hinge at its forward side, whichenables said table to drop within the space inclosed by said The saidmovable table operates against a suitable stop to locate its upwardposition, and the brake-joint hinged piece has simple devices tolikewise hold it in its upward position.

14 designates a chain, belt, or cable connection between the bar 9 andthe hinged leaf 2. One end of this chain is secured to said hinged leaf2 near its rear edge and passes over a roller 15, mounted in the rearportion of the stationary table 1 in such position that the chain takesits pull from the longitudinal center of the bar 9. The lower end of thechain 14 is connected to a threaded adjusting-screw 17, which by meansof adjustingnuts 18 18 has adjustable connection to the bar 9 throughthe stirrup 16. The stirrup has a self-adjusting movement bothlongitudinal and rocking on the bar 9. The chain lies in a suitablegroove 19 in the leaf 2 and the stationary table 1 when the movable ta.-ble 4 is raised to its highest position.

It will be understood that in opening or closing the hinged leaf 2 thelift and drop devices, consisting of the arms 6 6, the bar 9,

and the movable table 4, will be raised or lowered thereby through thechain connection between the said hinged leaf and the said lift and dropdevices. The connection of the chain being at the longitudinal center ofthe bar 9, equal pressure will be automatically given to each end of thetable when supported in its upper and operating position, and theelasticity of the bar 9 will hold the parts locked securely from rattleor vibration.

The act of opening or closing the hinged leaf 2 automatically compelsthe several members to perform their functions in a certain andeffective manner.

In Figs. 6 and 7 I have shown means for adjusting the tracks 11 11 toobtain a proper position relative to the rollers 10 10. This meansconsists in pivoting the lower ends of said tracks to the side pieces 20of the cabinet, said pivots being at 21. (See Fig. 6.) The'tracks 11 11have projecting from their outer sides lugs 22, which pass through slots23 in the sides 20 of the cabinet. 27 designates an adjusting-bolt whichpasses through said lugs 22 and thence through said slots 23 and thencethrough a portion 25 of the ribbon-frame or iron standard of the machineor any other suitable fixed portion of the cabinet. By turning the bolt27 it will be seen that the position of the tracks 11 11 will beaffected accordingly. The word cabinet as used in this specificationrefers to the wood furniture of a sewing-machine,

type-writer, or other machine operating-table, whether an iron standsupports the cabi net-work or not.

Having described my invention, I claim- 1. In an automatic lift and dropcabinet, a movable machine-table, a frame consisting of arms pivotallyconnected to the opposite ends of said table, a lifting-rodapproximately the length of said table and to the ends of which the saidarms are connected, rollers mounted on the ends of said frame, a trackmounted in a plane coinciding with the plane of movement of each of saidrollers and against which the said rollers ride, a stirrup mounted onsaid lifting-rod, said stirrup having a combined horizontal and rockingmovement on said lifting-rod, and an adjustable connection between saidstirrup and the hinged top leaf of the cabinet, through which movementis transmitted from said top leaf to the opposite ends of said movablemachine-table, substantially as set forth.

2. In an automatic lift and drop cabinet, a movable machine-table, anarm pivotally con nected at each end of said table, a horizontal bar tothe ends of which said arms are connected, the said bar beingessentially of a length which approximates the length of the movabletable so that said bar will have an elastic nature, the said arms andbar constituting a frame having a combined lateral and are movement,rollers mounted on the ends of said frame, tracks against which saidroll- ICC ers ride, said tracks each having a vertical and inclinedriding-surface which permit of the said combined lateral and aremovement of the frame, and means connected with the hinged leaf of thecabinet and the middle portion of said horizontal bar through which themovable machine-table is raised or lowered during the movement of saidhinged leaf, and whereby the actuating parts are kept in elastic tensionwhen the movable machine-table is raised to its highest or operativeposition.

3. In an automatic lift and drop cabinet, a movable machine-table, armspivotally connected to and near the ends of said table, a horizontalcross-bar connecting said arms, said arms and bar constituting a framewhich is adapted to a combined lateral and arc movement, rollers mountedon said frame, tracks against which said rollers ride, said tracks beingpivotally connected at their lower ends, and means for adjusting saidtracks at their upper ends, so that the positions of the same can bechanged.

4. In a lift and drop cabinet, a movable machine-table, arms pivotallyconnected to opposite ends of said table, a horizontal bar connected tosaid arms, said bar and arms constitutinga swinging frame which supportsthe movable machine table at two points and thereby prevents unduevibrations thereof, and receding tracks in the rear of said swingingframe and upon which said frame rides in the swinging movements thereof.

5. In an automatic lift and drop cabinet, the combination with a movablemachine-table, of a lift and drop frame consisting of arms pivotallyconnected to opposite points of said table, a horizontal bar connectingsaid arms, and receding tracks in the rear of said frame and againstwhich said frame rides in the lift and drop movements, said frame beinglocated and movable wholly within the dust-proof casing.

6. In a lift and drop cabinet, a movable machine-table, arms pivotallyconnected to opposite ends of said table, a horizontal crossbarconnected to said arms, said arms and cross-bar constituting a framewhich is movable wholly within the dust-proof casing, rollers mounted onsaid frame, and tracks located in the rear of said frame and againstwhich said rollers ride, the said tracks having tapering surfaces whichpermit the frame to move rearwardly and thereby complete its dropmovement within the dust-proof casing.

7. In a lift and drop cabinet, the combination with a hinged leaf and amovable machine-table, of a frame located and movable wholly within thedust-proof casing, said frame consisting of arms pivotally connected toopposite points of said movable machinetable, a horizontal bar to whichsaid arms are connected, the said bar being approximately the length ofsaid table, rollers mounted on said frame, tracks mounted in the rear ofsaid rollers and against which said rollers travel in the lift and dropmovements of the frame, said tracks terminating at their lower ends inrearward inclinations which permit the frame to move rearwardly incompleting its drop movements, and a connection between the horizontalbar and the hinged leaf whereby movement is imparted to said frame inthe movements of opening and closing the hinged leaf, substantially asand for the purposes specified.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAMS. CARLISLE.

Witnesses:

R. J. MCOARTY, JOHN W. KALBFUS.

